python入门-操作列表

1 Python根据缩进来进行判断代码行与前一个代码行的关系

for name in names:

　　print(name)

names = ['baker','david','philp','rose']

for name in names:
    print(name.title()+',that was a great trick!')
    print('I cannot wait to see your next trick '+ name.title()+'\n')

print('thank you,everyone,That was a great magic show!')

2 使用函数range() 范围  比如range(1,5)

打印的是1-4

for number in range(1,5):
    print(number)

numbers=list(range(1,5))
print(numbers)

even_numbers=list(range(2,11,2))
print(even_numbers)

squares=[]
for value in range(1,11):
    squares.append(value**2)

print(squares)

digits=[1,2,3,4,5,6,7,8,9,10]
print(min(digits))
print(max(digits))
print(sum(digits))

3 列表切片

plays=['baker','dingzong','xiaocui','philp']
print(plays[0:3])

4 不可变的列表叫做 元组

元组看起来犹如列表，但是使用圆括号二不是方括号来标识。

dimensions=(200,50)
print(dimensions[0])
print(dimensions[1])

for dimension in dimensions:
    print(dimension)

可以通过重新给元组赋值的方法，修改元组的值

dimensions=(400,100)
for dimension in dimensions:
    print(dimension)

用于存储生命周期内不可变的程序

5 设置代码格式 PEP8

1）每级缩进4个空格

2）行长不超过80字符

3）适当的空行